I am "Down to the Wire"! No Spark "John Walker"??

[Vincent Hill]

This is on my Friends 1980 911sc. This is also the one that "HAD" the Accel Ignition system. I "Removed" every trace of it and plugged in the Permatune and matching Ignition Coil.

Here is the story, As he is driving up to his house the engine Quits! He called me and we both thought the Fuel Pump stopped. I put in a relay that makes the pump run full time and the Fuel Pump is fine.

I check more and see No spark. Then I see the Accel Ignition and scratch my head. After speaking to the person that installed it I first think of my problems where John Walker asked if I had checked the Green wire! I replaced the Green wire with one from the 928 (Much longer) and "Still No Fire". No Pulses either so I Cleaned and replaced the Dist Pulse Coil and "Still No Fire"

I then am thinking that maybe the Accel is bad but do not know how to test so I unplug it and put in the Fairly new Permatune I have and replace the Ignition Coil. "Still No Fire"!

Maybe the ECU so I get mine and plug it in and "Still No Fire"

When I replaced the Ignition Coil I see that it looks like it was Severly Heated! It looks like varnish is coming out of it all around the edges. SO now I am thinking that maybe the Accel was putting out a lot more primary voltage and maybe not only burned out the Coil but also heated the wires inside the loom and maybe some melted together?

SO now my last test will be to take the Volt meter and test the wires to see if I can get a reading on 2 wires ends from the same start point (Like the Coil Neg Wire end to the Positive Wire at the Coil)

My Question is, Can anyone think of "ANYTHING" I have missed that is simple, easy or hard? Thanks everyone.

hill

[techman1]

Have you checked inside the distributor? Rotor?

[Andy911sc]

try replacing the hall sensor in the distributor. had the same problem with my old 924 and it came down to a simple $10 hall sensor (pick-up sensor) rock auto sells them for cheap and delivery is fast. Once replaced the engine fired up like nothing was ever wrong with it. I ended up replacing a lot on it and spending money I didn't have to.

[Bob Kontak]

Vincent has one of those pick up coils. He bought it last year as a spare.

[john walker's workshop]

got 12V to the permatune? it needs to be grounded at the case also. which permatune is it? color? bad PT would be my guess.

[Vincent Hill]

Originally Posted by techman1

Have you checked inside the distributor? Rotor?

I did not test the Rotor but I will Good Idea (and Simple)

[Vincent Hill]

Originally Posted by Andy911sc

try replacing the hall sensor in the distributor. had the same problem with my old 924 and it came down to a simple $10 hall sensor (pick-up sensor) rock auto sells them for cheap and delivery is fast. Once replaced the engine fired up like nothing was ever wrong with it. I ended up replacing a lot on it and spending money I didn't have to.

If your are referring to the White round wired Object under the Shield that I call the Pulse Coil, Yes as Bob said I bought 2 of the last year and put a new one in his Dist and checked the Ohms (510 this one and the old one was 590)

[Andy911sc]

yes and okay, I'm lost then.

[Vincent Hill]

Originally Posted by john walker's workshop

got 12V to the permatune? it needs to be grounded at the case also. which permatune is it? color? bad PT would be my guess.

It is the Black one with a 6 pin pigtail. I mounted it to the SHeet metal just above the Ground Strap that is attached to the Sheet Metal. Remember, Both ways (Accel and PT) I have had not fire.

On that 6 wire connector, which one is supposed to have voltage? (The Red Wire?) I will run a Ground from the PT Unit to the Coil Mount on the engine to make sure the PT Is 100% Grounded. Thanks Doc!

[Vincent Hill]

Originally Posted by Andy911sc

yes and okay, I'm lost then.

You are not the Lone Ranger here! I hope to do a little testing tonight to make sure of the Ground and voltage along with making sure that a few wires are not touching each other. Thank you,

hill

[Bob Kontak]

Originally Posted by Andy911sc

yes and okay, I'm lost then.

I don;t think this is the confusing issue - Maybe I confused the terms. The magnetic parts are the reluctor and stator. One spins and the other is static. They create the magnetic field above the coil pack in the distributor and "pick up" the collapsing magnetic field generating the pulse through the green wire.

My comment about Vince having one available (pick up coil), is from a thread we worked together on last year. Could have easily confused you given lack of context.

[Vincent Hill]

Originally Posted by Bob Kontak

I don;t think this is the confusing issue - Maybe I confused the terms. The magnetic parts are the reluctor and stator. One spins and the other is static. They create the magnetic field above the coil pack in the distributor and "pick up" the collapsing magnetic field generating the pulse through the green wire.

My comment about Vince having one available (pick up coil), is from a thread we worked together on last year. Could have easily confused you given lack of context.

Bob, I do not think he is lost on how it works, but what ever my problem is in getting it started!

I cannot find the Pic of the 6 pin connector that show what each wire is titled? I thought I should have found it on one of my old threads. Do you know where a Pic is that shows the wires and postions the factory gives them? I know the 2 wires on the end are from the Green wire Hot and Ground and on the other end the 2 wires are to both sides of the Coil. It is the Middle 2 wires. I think the red one should have current!

[Bob Kontak]

Here you go, Vince. About 1/3 the way down.

https://www.permatune.com/911SC902tech.html

[lonewolf]

Under the reg panel in that bundle of wires there is (or was there when car was built) a single rectangular connector with red going in and red coming out .
that is the 12v supply for the CD

[Andy911sc]

Bob,

I understand how that all works. I am just lost on his problem.

[Vincent Hill]

Originally Posted by lonewolf

Under the reg panel in that bundle of wires there is (or was there when car was built) a single rectangular connector with red going in and red coming out .
that is the 12v supply for the CD

I remember that wire from another car! I know what you are saying and will look for it and test it! You know I appreciate that and the Humor

[Vincent Hill]

Originally Posted by Bob Kontak

Here you go, Vince. About 1/3 the way down.

https://www.permatune.com/911SC902tech.html

"As Usual, U da Man Mr. Bob!" That was not what I was looking for but actually better because that is exactly how I marked them!

[Bob Kontak]

Originally Posted by Andy911sc

Bob,

I understand how that all works. I am just lost on his problem.

Got you. If Vince is NOT picking up the pulse from the green wire then you may be the lone ranger.

Vince remembers the Lone Ranger. Vince is a great guy. He is very sensitive about his age, though. I never mention it. However, he was into acting in his early years. Interesting factoid about Vince is that John Wilkes Booth interrupted his first stage appearance.

Edit:

[fred cook]

Check the small red wire in the CDI master plug for switched power. With the ignition switch in the run position the red wire should show +12v. Also check the grounds for continuity. After reading thru everything you have already done, this is about all I can think of that has not been checked. Good luck!

[Andy911sc]

You guys are cracking me up on here. I am currently bringing a 911sc out of a 16 year slumber. I just purchased in November. I have a thread going on here that I am tracking all my progress. You guys should check it out and see how I am coming a long.